Hitachi, Ltd.

Wataru Kitaura

Setsuo Arita

Tetsuo Ito

Yuji Ichinose

Hiroshi Ujita

Mitsuko Fukuda

Kohyu Fukunishi

A man-machine system connected to a plant has a storage device for storing data of an ideal operator model and recognizing section for inputting voice information generated by the operator and information about the operator's line of sight. When information about a failure in the plant is input into the man-machine system, plant data or operation information provided at the corresponding locations on an operational panel recognized by the recognizing section according to voice information or information about the operator's line of sight is selected and shown to the operator, so that the operator can take remedial measures for the failure quickly.

Man-machine system

A plurality of slave stations receive a plurality of apparatus information signals concerning apparatus to be controlled (or sensors), and a master station allots the apparatus information signals to time slots in a transmission path and receives a specified apparatus information signal with priority from the respective slave stations. A priority change information signal adder in the master station adds a priority change information signal for changing priority of the information signals transmitted from each slave station to an information transmission signal string containing a sync signal and various information signals transmitted to each slave station. A multi-element information signal separator/processor in the master station separates and processes the multi-element information signals transmitted from each slave station, on the basis of the priority change information signal. A detector/counter in each slave station detects the sync signal transmitted from the master station and counts the number of time slots following the sync signal. A transmission pattern reconstructor in the slave station reconstructs transmission patterns of the respective slave stations in accordance with the priority change information signal when a count value coincides with a predetermined value.

Multi-element information transmission system

Plural television cameras situated at monitored sites, each assigned with a particular code, generate image signals of the sites. An image signal transmitting unit receives those signals and transmits an image transmission signal over a transmission a monitoring site. The transmission signal is so formed that one channel of the transmission line which is divided into plural channels is assigned to the transmission of an image signal of high priority sites so as, to reproduce a full motion image of the remote site at the monitoring site and all the signals from the other sites are transmitted on a time-sharing basis through the remaining channels to reproduce frame repetition images. The assignment of the channels is determined by the order (priority) of codes included in an instruction signal from an instruction signal transmitting unit at the monitoring site. An operator can select the order (priority) of the codes.

Image transmission system

A plurality of permanent magnets are disposed on a movable object with predetermined spacings between them, and a fixed permanent magnet or magnets are disposed at positions spaced apart by a predetermined distance from the detection portion of a waveguide disposed along the movable object. Magnetostrictive ultrasonic waves generated on the waveguide are detected at the positions of these permanent magnets, and the position of the movable object is detected from the number of ultrasonic wave signals and the propagation time.

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Hitachi, Japan

Wataru Kitaura